Method and apparatus for wake free marine craft

Abstract

The hull design for this invention includes a sharp bow, deep V concave shape (“VC”) monohull with a reverse curvature running from a flat straight keel to the upper rail and also encompassing the entire hull length from the bow to the stern. The pointed bow with a bow rudder and a deep flat keel results in a smooth hull for guiding a water column free of a wave and water turbulence to the stern. A mainsail mast and a mizzen shroud slide transversely within limits to promote sail proximity and to achieve increased speed via an improved draft. The mizzen foresail is tacked by moving the mast windward; detaching the mizzen shroud; moving it forward to perform a tacking maneuver, and then moving it aft to a leeward position in relation to the mainsail; and re-attaching the mizzen mast to the moveable traveler.

1. An essentially wave free monohull marine craft having a longitudinal mid ship axis from bow to stern, a straight deep draft keel and a deck with a symmetrical deck rail on both sides of said craft, said craft being an in water type free from any planing configuration for said hull and characterized by comprising:
 a sharp pointed bow and a flat knife edge keel on a deep concave non-planing V hull remaining submersed in water; 
 said hull having a fully continuous exterior concave and pinched shape with said shape, in cross section, being a slightly concave V curvature symmetrically running from said flat knife edge keel to the deck rail and also encompassing an entire hull length from the bow to the stern; 
 a bow rudder also shaped with said concave V curvature as though said rudder were a forward continuous portion of said hull; and 
 said craft, when moving in the water, characterized in that said concave V curvature has a maximum arc constriction remaining below a waterline, which constriction collects and guides a water column along a wetted surface of the craft by laminar flow dispersion. 
 
     
     
       2. The marine craft in accordance with  claim 1  wherein said craft favors straight line travel and includes a forward watertight bulkhead, said craft further comprises:
 a pivot axis for said bow rudder lying on said longitudinal mid ship axis with said bow rudder centered on said longitudinal mid ship axis for straight line travel and capable of pivoting both to port and starboard a fixed angular amount relative to said pivot axis for steering said craft. 
 
     
     
       3. The marine craft in accordance with  claim 2  and further comprising:
 said forward watertight bulkhead is formed with a vertical hemi-cylindrical column serving as said pivot axis; 
 said bow rudder having a matching hemi-cylindrical cup for angular swiveling movement within the column of said bulkhead; and 
 a pair of stop shoulders formed in the bulkhead, and located on either side of said column, for limiting an angular amount of pivot movement by said bow rudder. 
 
     
     
       4. The marine craft of  claim 3  wherein the craft is a sail boat having a mainsail mast and a mizzen sail with a mizzen shroud detachable from said deck location, and further comprising:
 a moveable mainsail mast base that slides transversely while said craft is moving within fixed limits relative to said longitudinal mid ship axis in order to promote sail changes and to achieve increased speed via an improved draft; and 
 said mizzen sail being tacked by moving the mainsail mast windward and detaching the mizzen shroud so that it and a mainsail may be moved apart a distance sufficient for the mizzen sail to clear the mainsail mast. 
 
     
     
       5. The sail boat of  claim 4  wherein the mainsail has a mainsail boom and further comprising:
 the mizzen sail has a mizzen sail boom extending all the way back from its point of attachment to said deck to an aft end of the mainsail boom. 
 
     
     
       6. The sail boat of  claim 5  wherein foot ends of the mizzen boom are attachable to and detachable from a boom foot traveler located on the deck, and further comprising:
 said mizzen shroud and mizzen boom, when detached from the deck, are movable forward and upward a sufficient amount to allow the mizzen sail to clear the mainsail mast; and 
 when so moved, the mizzen sail and boom swing leeward. 
 
     
     
       7. A method of constructing a sail boat having a longitudinal mid ship axis along a monohull from bow to stern for said boat, a straight deep draft keel, a foremost watertight bulkhead and a deck with a symmetrical deck rail on both sides of said boat, said method characterized by comprising the steps of:
 fashioning a submersed in-the-water hull having a fully continuous exterior concave or pinched shape, with said shape, in cross section, being a slightly concave submerged V curvature symmetrically running from said keel to a deck rail on both sides of said boat and also running an entire submerged hull length from the bow to the stern; 
 placing a bow rudder, which has a matching concave V curvature with an area of maximum constriction matching the hull; 
 installing said bow rudder just forward of a foremost watertight bulkhead for said boat; and 
 collecting water into a water column by said maximum constriction area along a wetted surface of the boat; and 
 dispersing water away from the stern by virtue of converging water columns. 
 
     
     
       8. The method in accordance with  claim 7  wherein the sail boat has a mainsail mast with a moveable mast base and a mizzen sail with a mizzen shroud detachable from a moveable mizzen boom traveler, and further comprising the steps of:
 sliding said moveable mainsail mast base transversely windward relative to a mid ship axis for said sail boat; 
 sliding the moveable mizzen shroud traveler to leeward; 
 detaching the mizzen shroud from its attachment to said deck; and 
 moving the detached mizzen shroud and the mizzen boom forward a sufficient distance for the mizzen shroud and the mizzen boom to clear the mainsail mast. 
 
     
     
       9. A method of constructing a sail boat having a longitudinal mid ship axis along a monohull from bow to stern for said boat, a straight deep draft knife edge keel, and a deck with a symmetrical deck rail on both sides of said boat, said method characterized by comprising the steps of:
 fashioning a partially submerged hull with a fully continuous exterior concave shape, which, in cross section, is a slightly concave pinched V curvature symmetrically running from said knife edge keel to the deck rail on both sides of said boat and also running an entire submerged hull length from the bow to the stern; and 
 collecting and guiding a water column via said hull shape at points of maximum arc constriction along a wetted submerged surface of the boat. 
 
     
     
       10. The method in accordance with  claim 9  wherein the sail boat has a stern rudder and favors straight line travel; and further comprising the step of:
 placing a bow rudder with a pinched V curvature that matches said hull shape at the foremost bow portion of said hull. 
 
     
     
       11. The method in accordance with  claim 9  wherein the sail boat has a moveable mainsail mast base and a mizzen sail and boom with a mizzen shroud detachable from a moveable deck traveler, and further comprising the steps of:
 sliding said moveable mainsail mast base transversely windward relative to said longitudinal mid ship axis; 
 sliding the mizzen shroud to leeward; 
 detaching the mizzen shroud from its attachment to said deck; and 
 moving the detached mizzen shroud and the mizzen boom forward a sufficient distance for the mizzen shroud and the mizzen boom to clear the mainsail mast.